Water-gage.



Patented Bec. 23, i902.

J. z A. 7, lo 7 0. N

WATER GAGE.

(Application filled Apr. 25, 1900. Renewed July 8. 1902.)

(No Model.)

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Ntra STATES: l

JOHN MCCORMICK, OF WILMERDING, PENNSYLVANIA, ASSIGNOR, BY

DIRECT AND MESNE ASSIGNMENTS, TO HENRY M. LYTLE, OF WIL- KINSBURG, PENNSYLVANIA, AND JOI-IN A. FULLMER, OF PITTS- BURG, PENNSYLVANIA.

WATER SPECIFICATION forming part of Letters Patent No. 716,742, dated December 23, 1902- Application iiled April 25, 1900. Renewed July 8, 1902. Serial No. 114,834. (No model.)

T0 @ZZ whom, z'zi muy concern:

Be it known that I, JOHN McGonMIcK, a citizen of the United States of America', residing at Wilmerding, in the county ot Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in lVater-Gages for Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to an improved automatic-operating Water-gage for steam-boilers; and it consists in a strong glass tube arranged in a vertical position and connected to the boiler and'in communication with the interior of the same by means of suitablyformed fittings and in a manner that should the said tube accidentally break the arrangement of valves will instantly close to confine and shut in the water and steam; and the invention further consistsY in the certain details of construction and combination of parts, as will be fully described hereinafter.

In the accompanying drawings, Figure 1 is a side elevation of my improved water-gage, showing the same connected to the shell of a boiler or steamgenerator,l the said gage'being constructed and arranged in accordance with my invention. Fig. -2 is a front elevation of the same. Fig. 3 is a sectional plan view taken through the center of either the top or bottom fitting, the one being analogous with the other except being right and left hand shells or casings.

To construct a water-gage for steam-boilers in accordance with my invention, I form from suitable metal the upper and lower ittings or shells 2, each having a screw-thread 5, by means of which the same are firmly attached to the boiler, 18, the one above and in a vertical line with the other. These two iittings are joined together by a strong glass tube 1 and the connections made by stuffingboxes 4 in a manner well known in the art and the said connections rendered steam and water tight. This glass tube 1 is in direct communication with the interior of the boiler both above and below the water-level by means of passages 6, leading from the boiler 18 into chambers 7 in each of the fittings and from the said chambers through openings 8 into passages 10, leading directly tothe tube l, which will give a free circulation of steam and water into the said tube. Formed in each of the openings 8 leading from the chambers 7 to the passages 10 are valve-seats 9, fitted with valves 11, formed integral with suitable stems 1,2. Each ol the chambers 7 is closed by means of screw-caps 14, through which the valve-stems 12 project, and the connections rendered steam-tight by packing-boxes 17, in which suitable brous packing 19 is placed. To relieve the steam and water pressure from the packing 19 while the water-gage is in operation, a valve-seat 15 is formed ou the inner side of each of the screwcaps 14 and about each of the valve-stems 12 and the said stems provided with an annular integral ring 16, which will be held seated by the steam-pressure from the boiler, as will be seen by reference to Fig. 3 of the drawings.

Each of the valve-stems 12 is provided with suitable handles 13 and the lower fitting 2 formed with a boss 18, in which a small drain orblow-of cock is connected, communicating with the passage 10 yand is used to blow oft' or clean any sediment from the tube 1 by the aid of the pressure of the steam and water in the boiler.

In operation each of the valves 11 in the two ttings occupies a position such as shown at Fig. 3 of the drawings, which permits a free circulation of the steam and water to the glass tube 1, as the pressureY isequalized on both sides of the said valvesll. Should the glass tube 1 accidentally break, the force of steam and water from the boilerf rushing through the openings 8 to the atmosphere will instantly cause the valves 11" to close upon their seats 9 and be held iirmly in that position by the boiler-pressure, thereby preventing any escape of steam or water from the broken tube. When a new tube has been arranged in' position, it is onlyne'cessary to withdraw one of the valves 11 from its seat by means of the handle 13, which action Wil open the circulation to the tube and also open the other valve by the back pressure from the boiler.

The advantages of this construction and arrangement of a water-gage is that the same may be operated either by hand or automatic, the valve-,seats ground, and the packing of the stuffing-box renewed at Will, as is obvious.

Various slight modifications and changes may be made in the general details of construction Without departing from the spirit of the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

In a water-gage the shells 2, each having a conical threaded nipple 5, a chambered portion 7 of said shell at one side of the center of said nipple and communicating therewith through a tortuous channel 6, a passage-Way communicating with a Water-gage, a partition-Wall 8X in line with the aperture in said nipple and having a duct 8 leading from said chamber 7 to the passage-way 10, a threaded and apertured cap 14 tted over the outer JOHN MCCORMICK.

Witnesses:

JAMES J. CLooNAN, H. M. LEVIS. 

